Currently I have no information connecting siblings Elizabeth and Henry to Martha. Martha and Elizabeth married Wilson brothers Benjamin and Jeremiah, so I suspect they may be sisters from the Ridenour family that married brothers from the Wilson family. From the book "ANCESTORS ARE FOREVER, A RIDENOUR COLLECTION FROM 893 AD TO 2000 AD" I gathered the following information on Elizabeth and Henry:

Any help or insight on this (possible) relationship would be greatly appreciated. I am also looking to find confirmation on the Wilsons parents and ancestors. That would definitely be a bonus and appreciated as well.